Gauging Parameter Calculator
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Technical documentation

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Key user guides:


GPC variants based on gas gauge types and type of optimization

  1. GPC for Compensated End of Discharge Voltage (CEDV) algorithm gas gauges
  2. GPC for Impedance Track (IT) algorithm gas gauges
    1. GPC - Find closest chemistry match (chemID selection)  Must be done before (2) or (3).
    2. GPC -Optimize room temperature performance (calculate Qmax, Ra, and Thermal coefficients).
    3. GPC - Optimize room and low temperature performance. Includes (2).


Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching parameters/coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over temperature.

The battery pack must use one of TI's Compensated End of Discharge Voltage (CEDV) or Impedance Track (IT) algorithm based fuel gauges. It accepts log files in the format specified in the instruction manual. The log files can be created by using TI's Battery Management Studio (bqStudio) software with the specific evaluation board connected through USB, or by any battery tester with data logging capabilities like Arbin or Maccor. External equipment is required for charge and discharge. For accurate calculations it will also require additional parameters of the battery pack setup. The output information will be emailed as a text file containing the CEDV coefficients and/or as optimized data files. This data can be programmed into Data Flash using bqStudio to create a golden image that can be used in mass production of battery packs.

If bqStudio is used for logging, an EV2300 or EV2400 PC interface board is required to interface to the gas gauge, and a PC USB cable is required for communication with a PC. Both can be ordered online at Windows™-based PC software is available online as well. With the EV2300 or EV2400 interface board and software, the user can read the data registers, program the chipset for different configurations, log cycle data for further evaluation, and evaluate the overall functionality of the solution under different charge and discharge conditions.

This tool does not require the purchase of a separate Mathcad™ license.

For CEDV gauges, the bqStudio software provides a packaging utility to create the zip file from the log files.

GPC is comprised of three modules/steps:

  1. Download instruction manual/packaging tool and package data - this downloadable instruction manual provides information on setting up the battery pack for charge and discharge at multiple temperature points. It guides the user through the steps to obtain good data and specify the device parameters needed for their application. Parameters include battery pack discharge/charge rates, termination conditions, temperature and pack specific information.
  2. Upload zip file - upon completion of data packaging per the instruction manual, the users can then upload the packaged zip file to TI for the gauging parameter analysis. Registration and legal agreement acceptance is required for the upload.
  3. Emailed Gauging Parameter Calculator report - contains the information on gauging parameter constants that best fit the uploaded data. The report includes values for EMF, EDVC0, EDVC1, EDVR1, EDVR0, EDVT0, EDVTC, VOC75, VOC50, VOC25 and programmable data files (some of these values may not apply to specific gauges).


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TI's Standard Terms and Conditions for Evaluation Modules apply.

Technical documentation
Application note (1)
Title Type Size (KB) Date
PDF 78 05 Jun 2018
User guide (2)
Title Type Size (KB) Date
PDF 31 30 Jan 2018
PDF 62 10 Sep 2015

Software development (4)

Name Part Number Software Type
Gauging Parameter Calculator for CEDV gauges  GPCCEDV  Application software & framework 
Gauging Parameter Calculator: Match chemistry for Impedance Track gauges  GPCCHEM  Application software & framework 
Gauging Parameter Calculator: Optimize room and low temp performance Impedance Track gauges  GPCRB  Application software & framework 
Gauging Parameter Calculator: Optimize room temperature performance for Impedance Track gauges  GPCRA0  Application software & framework 

TI Devices (16)

Part Number Name Product Family
BQ2060  Multi-chemistry SBS 1.1 compliant gas gauge with 5 LED drivers  Battery management ICs 
BQ2060A  Multi-chemistry SBS 1.1 compliant gas gauge with 5 LED drivers, Additional battery mgmt control  Battery management ICs 
BQ2084-V143  SBS v1.1 compliant gas gauge for use with the BQ29312A  Battery management ICs 
BQ2085  SBS 1.1 compliant gas gauge with integrated Oscillator for use with The bq29311  Battery management ICs 
BQ27220  Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles  Battery management ICs 
BQ27320  Single cell pack/System-side CEDV battery fuel (gas) gauge  Battery management ICs 
BQ27426  Single cell System-side battery fuel (gas) gauge w/Pre-programmed chemistry Profile  Battery management ICs 
BQ28400  Netbook and Tablet Lithium ion gas gauge and protector  Battery management ICs 
BQ28550  Single cell Li-ion battery gas gauge and protection  Battery management ICs 
BQ28Z610  Battery fuel gauge with integrated protector for 1-2 series packs  Battery management ICs 
BQ3050  SBS 1.1-compliant 2-s to 4-s battery gas gauge & protection  Battery management ICs 
BQ3060  SBS 1.1-compliant gas gauge and protector  Battery management ICs 
BQ78350  Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family  Battery management ICs 
BQ78350-R1  CEDV li-ion gas gauge and battery management controller  Battery management ICs 
BQ78350-R1A  CEDV li-ion gas gauge and battery management controller  Battery management ICs 
BQ78Z100  Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series  Battery management ICs 

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